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      02-28-2013, 07:28 AM   #3
killerbee1
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Drives: Dinan RS3
Join Date: Jul 2012
Location: Dallas, Texas

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You don't! I wouldn't shave any precious amount of metal off of the rotors, they're thin enough to start with. You can scuff them up slightly, if you like, with some emery cloth or Just put them on and start driving. For best results, always start with new rotors and pads.